展示页面分页查询数据 第一稿 用静态方法刷新的页面 支持浏览器

<project 
xmlns="http://maven.apache.org/POM/4.0.0" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.crud</groupId>
	<artifactId>ssm_crud</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>
	<!-- 引入项目依赖jar包 -->
	<!-- SpringMVC和Spring -->
	<!-- 链接地址： http://mvnrepository.com/ -->

	<dependencies>
		<!-- SpringMVC包 -->
		<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>4.3.7.RELEASE</version>
		</dependency>
		<!-- Spring JDBC包 -->
		<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>4.3.7.RELEASE</version>
		</dependency>
		<!-- Spring事务 -->
		<!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
			<version>4.3.7.RELEASE</version>
		</dependency>
		<!-- Mybatis包 -->
		<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.4.2</version>
		</dependency>
		<!-- Mybatis和Spring的整合包 -->
		<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>1.3.1</version>
		</dependency>
		<!-- 连接池包 -->
		<!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->
		<dependency>
			<groupId>c3p0</groupId>
			<artifactId>c3p0</artifactId>
			<version>0.9.1.2</version>
		</dependency>
		<!-- 数据库驱动包 -->
		<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.41</version>
		</dependency>
		<!-- JSTL包 用于JSP编写 -->
		<!-- https://mvnrepository.com/artifact/jstl/jstl -->
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
		<!-- servlet的相关接口 httprequestservlet等 -->
		<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.0.1</version>
			<scope>provided</scope>
		</dependency>
		<!-- junit工具包 -->
		<!-- https://mvnrepository.com/artifact/junit/junit -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
			<!-- <scope>test</scope> -->
		</dependency>
		<!-- mybatis逆向工程 -->
		<!-- 
https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core 
-->
		<dependency>
			<groupId>org.mybatis.generator</groupId>
			<artifactId>mybatis-generator-core</artifactId>
			<version>1.3.5</version>
		</dependency>
		<!-- spring整合junit工具包 -->
		<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>4.3.7.RELEASE</version>
			<!-- <scope>test</scope> -->
		</dependency>
		<!-- 分页功能包 -->
		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper</artifactId>
			<version>5.1.2</version>
		</dependency>
		<!-- 封装JSON返回给前端 -->
		<!-- 
https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.8.8</version>
		</dependency>
		<!-- JSR303校验包 -->
		<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-validator</artifactId>
			<version>5.4.1.Final</version>
		</dependency>
	</dependencies>
	<!-- 配置tomcat插件 -->
	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.tomcat.maven</groupId>
				<artifactId>tomcat7-maven-plugin</artifactId>
				<configuration>
					<path>/</path>
					<port>8081</port>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
	<!-- 开启驼峰命名规则 -->
	<settings>
		<setting name="mapUnderscoreToCamelCase" value="true"/>
	</settings>
	
	<!-- 配置别名 实体类的位置 方便引用-->
	<typeAliases>
		<package name="com.crud.dao"/>
	</typeAliases>
	
	<plugins>
	    <!-- com.github.pagehelper为PageHelper类所在包名 -->
	    <plugin interceptor="com.github.pagehelper.PageInterceptor">
	    	<!-- 不到达不正确的页码 -->
	    	<property name="reasonable" value="true"/>
		</plugin>
	</plugins>
</configuration>

	//管理用户页面
	@RequestMapping(value="/admin/manage_user.action")
	public String adminDeleteUser(@RequestParam(value="pn",defaultValue="1")
Integer pn,HttpServletRequest request,Model model) throws Exception {	
		// 引入PageHelper分页插件
		// 查询前调用,传入页码也记录数 pageNum, pageSize
		PageHelper.startPage(pn, 5);
		// startPage紧跟着的这个查询就是一个分页查询
		HttpSession session = request.getSession();
		UserAccount currentUser = (UserAccount) session.getAttribute("currentUser");
		Integer userType = currentUser.getUserType();
		Integer userId = currentUser.getUserId();
		List<UserAccount> users = new ArrayList<UserAccount>();
		// 如果是admin账户则需要查询所有的账户    	
		if(userType==0) {    		
			users = loginService.getAllUsers();
		}else {
			// 如果是普通管理员账户就只需要查询子账户的信息(自己的账户只能是admin账户才可以管理)
			// 通过userId查询子账号的的所有用户
			users = loginService.getAllChildrenUsersByUserId(userId);
		}
		// PageInfo包装查询结果，封装了详细的分页信息和详细数据
		// 连续显示5页
		PageInfo<UserAccount> pageInfo = new PageInfo<UserAccount>(users, 5);
		// 把PageInfo交给页面即可
		model.addAttribute("pageInfo", pageInfo);
		return "/admin/manage_user";		
	}
	

    /**
     * 展示页面 查询用户数据（分页查询） 第一稿 用静态方法刷新的页面，支持浏览器
     * @param pn
     * @param model
     * @param request
     * @return
     */
    @RequestMapping("/admin/users")
    public String getUsers(@RequestParam(value="pn",defaultValue="1")Integer pn, 
Model model, HttpServletRequest request) {
    	try {
			// 引入PageHelper分页插件
			// 查询前调用,传入页码也记录数 pageNum, pageSize
			PageHelper.startPage(pn, 5);
			// startPage紧跟着的这个查询就是一个分页查询
			HttpSession session = request.getSession();
			UserAccount currentUser = (UserAccount) session.getAttribute("currentUser");
			Integer userType = currentUser.getUserType();
			Integer userId = currentUser.getUserId();
			List<UserAccount> users = new ArrayList<UserAccount>();
			// 如果是admin账户则需要查询所有的账户    	
			if(userType==0) {    		
				users = loginService.getAllUsers();
			}else {
		// 如果是普通管理员账户就只需要查询子账户的信息(自己的账户只能是admin账户才可以管理)
				// 通过userId查询子账号的的所有用户
				users = loginService.getAllChildrenUsersByUserId(userId);
			}
			// PageInfo包装查询结果，封装了详细的分页信息和详细数据
			// 连续显示5页
			PageInfo<UserAccount> pageInfo = new PageInfo<UserAccount>(users, 5);
			// 把PageInfo交给页面即可
			model.addAttribute("pageInfo", pageInfo);
			return "/admin/manage_user";
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
    }